You should try Ooma Telo as a phone service:

Ooma Telo home phone service is an internet based telephone service provider. It provides a wide range of services such as home phone service, voicemail service, fax service, online bill pay service, etc. The company’s main objective is to provide reliable and efficient customer service and high quality products.

Ooma Telo Black Friday service allows you to make and receive calls from anywhere in the world, using any device that supports VoIP applications, such as smartphones, tablets, and computers. The company has a great reputation in the market because of its reliable and affordable services. You can choose Ooma Telo home phone service to keep your home number, and receive calls at your mobile phones.

The company’s products are easy to use and the setup is simple. Once you sign up, you get to choose your plans, and set up your account. Your Ooma Telo home phone number is assigned to you, and you can access it from anywhere in the world.

The company offers unlimited local calling, international calling, and mobile calling. You can also choose the number of minutes you need for your plan. You can connect the number to your landline, and even to mobile phones.

First of all: Hi everyone! Second of all: I'm so sorry if this isn't an appropriate sub-forum for this topic. I just don't have an idea where to open it...

I need help and honest opinions about cell phone service providers in the USA. I need one only for making phone calls all over the country (and perchance sending TEXT messages). I'm not interested in international phone calls, internet, graphical messages, cybernetic foot massage and any other "extra" stuff. And I would like it cheap... in my sim chip.

So, is anyone able to tell me what is the cheapest way to get:
unlimited phone calls all over the USA (or at least California - where I live) which will work from my cell phone (which is for sim chips)?

I will appreciate your help!